نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه علوم دامی، دانشکده علوم و مهندسی کشاورزی، دانشگاه رازی، کرمانشاه، ایران
2 گروه علوم دامی، دانشکده کشاورزی، دانشگاه بوعلی سینا، همدان، ایران.
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Corn fodder with 28% DM were harvested, chopped and after applying treatments were ensiled in 30kg bags. The experimental treatments were: Silage without microbial inoculation (control), silage inoculated with Lactobacillus fermentum produced in the laboratory (Lab), silage inoculated with mixture of Lactobacillus fermentum, Lactobacillus salivarius, Pediococcus acidilactici and Enterococcus faecium (Lab), and silage inoculated with commercial bacteria containing Enterococcus faecium, Lactobacillus brevis and Lactobacillus plantarum. Sixteen Holstein cows in the middle of lactation (160 ± 0.10 days of lactation) were used on a 4 x 4 integrated Latin square design with periods of 21 days. The milk production of treatments was not significantly different from the control, but 3.5% fat corrected milk of cows receiving inoculated silage was more than control. The percentages of milk fat, protein and solids-non-fat were higher in first treatment than others . Cows fed with laboratory inoculated silages had a higher DMI than control and third treatment. The digestibility of DM, CP and ADF was higher in the inoculated treatments than control and the highest was related to the second treatment. The rumen ammonia nitrogen in the first and second treatments was lower than control. The rumen percentage of acetate was higher in control and the second treatment, and propionate was higher in the inoculated treatments than control. The overall conclusion showed that the bacterial inoculation of corn silage had no significant effect on milk production, although it increased 3.5% fat corrected milk, percentages of milk fat and protein as well as digestibility of nutrients.
کلیدواژهها [English]
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